Indication of Another Intermediate-mass Black Hole in the Galactic Center

@article{Takekawa2019IndicationOA,
  title={Indication of Another Intermediate-mass Black Hole in the Galactic Center},
  author={Shunya Takekawa and Tomoharu Oka and Yuhei Iwata and Shiho Tsujimoto and Mariko Nomura},
  journal={The Astrophysical Journal},
  year={2019}
}
We report the discovery of molecular gas streams orbiting around an invisible massive object in the central region of our Galaxy, based on the high-resolution molecular line observations with the Atacama Large Millimeter/submillimeter Array (ALMA). The morphology and kinematics of these streams can be reproduced well through two Keplerian orbits around a single point mass of $(3.2 \pm 0.6)\times 10^4 \ M_\odot$. We also found ionized gas toward the inner part of the orbiting gas, indicating… Expand

Figures and Tables from this paper

The Fifth Candidate for an Intermediate-mass Black Hole in the Galactic Center
We report the results of high-resolution molecular line observations of the high-velocity compact cloud HCN-0.085-0.094 with the Atacama Large Millimeter/submillimeter Array. The HCN J=4-3, HCO$^+$Expand
The geometry of the gas surrounding the Central Molecular Zone: on the origin of localized molecular clouds with extreme velocity dispersions
Observations of molecular gas near the Galactic Centre (|l| < 10°, |b| < 1°) reveal the presence of a distinct population of enigmatic compact clouds that are characterized by extreme velocityExpand
Massive Primordial Black Holes
A review of the astronomical data of several last years on an astonishingly high amount of black holes in the contemporary and early ($z\sim 10$) universe is presented. Also the data on the recentlyExpand
Cloud–cloud collisions in the common foot point of molecular loops 1 and 2 in the Galactic Center
Recent large-area, deep CO surveys in the Galactic disk have revealed the formation of ~50 high-mass stars or clusters triggered by cloud-cloud collisions (CCCs). Although the Galactic Center (GC) --Expand
Intermediate-mass black holes from stellar mergers in young star clusters
Intermediate-mass black holes (IMBHs) in the mass range $10^2\!-\!10^5\, \mathrm{M_{\odot }}$ bridge the gap between stellar black holes (BHs) and supermassive BHs. Here, we investigate theExpand
Light, medium-weight, or heavy? The nature of the first supermassive black hole seeds
Observations of hyper-luminous quasars at z > 6 reveal the rapid growth of supermassive black holes (SMBHs > 109M ) whose origin is still difficult to explain. Their progenitors may have formed asExpand
Resonant Dynamical Friction in Nuclear Star Clusters: Rapid Alignment of an Intermediate-mass Black Hole with a Stellar Disk
We investigate the dynamical evolution of an intermediate-mass black hole (IMBH) in a nuclear star cluster hosting a supermassive black hole (SMBH) and both a spherical and a flattened disk-likeExpand
An energetic high-velocity compact cloud: CO−0.31+0.11
We have discovered an energetic high-velocity compact cloud CO$\, -0.31+$0.11 in the central molecular zone of our Galaxy. CO$\, -0.31+$0.11 is located at a projected distance of ∼45 pc from theExpand
Hoyle–Lyttleton accretion on to black hole accretion disks with super-Eddington luminosity for dusty gas
We investigate the Hoyle-Lyttleton accretion of dusty-gas for the case where the central source is the black hole accretion disk. By solving the equation of motion taking into account the radiationExpand
Coronal heating problem solution by means of axion origin photons
Abstract In this paper we advocate for the idea that two seemingly unrelated mysteries with almost 90 year history – the nature of dark matter and the million-degree solar corona – may be but twoExpand
...
1
2
...

References

SHOWING 1-10 OF 54 REFERENCES
An intermediate-mass black hole of over 500 solar masses in the galaxy ESO 243-49
TLDR
The detection of a variable X-ray source with a maximum 0.2–10 keV luminosity of up to 1.1 in the edge-on spiral galaxy ESO’243-49 is reported, with an implied conservative lower limit for the mass of the black hole of ∼500. Expand
Millimetre-wave emission from an intermediate-mass black hole candidate in the Milky Way
It is widely accepted that black holes with masses greater than a million solar masses (M⊙) lurk at the centres of massive galaxies. The origins of such ‘supermassive’ black holes (SMBHs) remainExpand
The Second Galactic Center Black Hole?; A Possible Detection of Ionized Gas Orbiting around an IMBH embedded in the Galactic Center IRS13E complex
The Galactic Center is the nuclear region of the nearest spiral galaxy, Milky Way, and contains the supermassive black hole with M~4x10^6 Msun, Sagittarius A* (Sgr A*). One of basic questions aboutExpand
Signature of an Intermediate-Mass Black Hole in the Central Molecular Zone of Our Galaxy
We mapped the high-velocity compact cloud CO-0.40-0.22 in 21 molecular lines in the 3 mm band using the Nobeyama Radio Observatory 45 m radio telescope. Eighteen lines were detected fromExpand
An intermediate-mass black hole in the centre of the globular cluster 47 Tucanae
TLDR
There is evidence for a central black hole in 47 Tucanae with a mass of solar masses when the dynamical state of the globular cluster is probed with pulsars, suggesting that the black hole is not accreting at a sufficient rate to make it electromagnetically bright and therefore, contrary to expectations, is gas-starved. Expand
NO EVIDENCE FOR INTERMEDIATE-MASS BLACK HOLES IN GLOBULAR CLUSTERS: STRONG CONSTRAINTS FROM THE JVLA
With a goal of searching for accreting intermediate-mass black holes (IMBHs), we report the results of ultra-deep Jansky Very Large Array radio continuum observations of the cores of three GalacticExpand
The First Low-mass Black Hole X-Ray Binary Identified in Quiescence Outside of a Globular Cluster
The observed relation between the X-ray and radio properties of low-luminosity accreting black holes (BHs) has enabled the identification of multiple candidate black hole X-ray binaries (BHXBs) inExpand
A Black Hole in the Galactic Center Complex IRS 13E
The IRS 13E complex is an unusual concentration of massive, early-type stars at a projected distance of ~0.13 pc from the Milky Way's central supermassive black hole Sagittarius A* (Sgr A*). BecauseExpand
A dark jet dominates the power output of the stellar black hole Cygnus X-1
Black holes undergoing accretion are thought to emit the bulk of their power in the X-ray band by releasing the gravitational potential energy of the infalling matter. At the same time, they areExpand
A ∼50,000 M⊙ SOLAR MASS BLACK HOLE IN THE NUCLEUS OF RGG 118
Scaling relations between black hole (BH) masses and their host galaxy properties have been studied extensively over the last two decades, and point toward co-evolution of central massive BHs andExpand
...
1
2
3
4
5
...